package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo4 {
    public static void main(String[] args) {
        Collection<String> c1 = new ArrayList<>();
        c1.add("hello");
        c1.add("world");
        c1.add("java");
        System.out.println("c1:"+c1);

        Collection<String> c2 = new ArrayList<>();
        c2.add("java");
        c2.add("world");
        c2.add("python");
        System.out.println("c2:"+c2);

        c1.addAll(c2);
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection<String> c3 = new ArrayList<>();
        c3.add("hello");
        c3.add("c++");
        c3.add("c");
        boolean contains = c1.containsAll(c3);
        System.out.println(contains);

//        c1.retainAll(c3);
//        System.out.println("c1:"+c1);
//        System.out.println("c3:"+c3);

        c1.removeAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);
    }
}
